Crushing machine



April 17, 1928.

J. A. DORMER ET AL CRUSHING MACHINE Filed Sent. 29V 1926 2 Sheets-Sheetl e?? i ae//yej April 17, 1928.

Patented Apr.v 17, 1928.

UNITED STATES 1,666,536 PATENT o-ErlcE.

JOHN A. DORMER AND JAMES GUNNELL MALONE, 0F DETROIT, MICHIGAN.

CRUSHING MACHINE.

Application filed September 29, 1926. Serial No. 138,375.

This invention relates to new and useful improvements in rock or orecrushing machines and has especial reference to that type of crusherwherein the material to be crushed is deposited between a pair of spacedconical plates arranged to rotate together, one of the said plates beingcapable of a t-ilting movement with respect to the other plate.

An object of the present invention is to provide a simplified andimproved mechv anism inr combination withr such crushing plates, wherebysuch machines are made more, flexible. I

Another object of the invention is to increase the durability of suchmachines and insure a low economical maintenance.

A still further object of the present in- Vention is to eliminate theundesirable friction accompanying the use of eccentrics to tilt thetilting plate shaft, by the use of rollers engaging a cam carried onlthe end of the tilting plate shaft.

lA still further object of the invention is to provide a crushingYmachine effecting a greater crushing' power, which utilizes a singledrive, and saves in parts andreduces power input.

Other objects of the invention will appear hereinafter.

In the accompanying drawing:

Figure 1 is a vertical longitudinal sectional view of the crushingmachine;

Fig. 2 isa cross sectional view upon the line II-II of Fig. 1, of themechanism for transmitting a`tilting movement to one of the crushingplates; j

Fig. 3 is a detail sectional view taken on the line III-III of Figure 1,showing the driving key by which both plates are caused to rotatetogether;

Fig. 4 is a detail longitudinal sectional view of the gyratory mechanismeffecting tiltingl of the crushing plates and showing a slightlymodified construction;

Fig. 5 is a vertical sectional vView taken on the line V-V of Figure 4;and Y l Fig. 6 is a sectional detail View showing a flexible connectionbetween crusher head and end of the outer casing. v

Like numerals of reference-indicate corresponding parts.

Referring now to the drawingsz- Reference character 10 indicates Vthemachine frame or support having formed in its forward end a bearing 11and in its rear end another bearing 12 aligning with the said bearing11, said rear bearing lia-ving a rearward circular extension 13preferably shaped as yshown and provided with a counterbore 14.

Journaled 'within the bearings is a hollow shaft 15 having at itsforward end a cup'- shaped extension Mor socket' 15a projectinl beyondthe bearing 11., Said hollow shafgt 15 contains therein a tapered shaft16, the forward end of which is adaptedy to'carry a spherical member, orcrusher head "17 pro'- vided with a suitable bearing surface upon whichthe conical crushing plate 18 is.se. cured by any suitable meansdesired, such as a circular plate 19 engaging an axial opening in theplate 18 and secured to the end of the shaft 16 by a screw 8. l

The cup-shaped extension 15 of the shaft 15, preferably has formedthereon one` or more lugs 2O properly positioned for engagement withinslots 21 formed in the outer periphery of the spherical member orcrusher head 17, whereby shaft 15 Vis caused to drive the shaft 16. Thesurface of the head 17 opposing the plate 18 is preferably' faced with asmooth lining 7. 1 Y y An outer or end cover plate 22 having securedthereto an outer conical 'crushing plate 23 in opposed relation to theplate 18, is

`bolted to and spaced from the flanged cupshaped extension 15a of theshaft15, bythe bolts l211 and spacers 25, and a series ofshims 26 ispreferably placed ron these bolts adjacent the spacers to give thevdesired adl justmentV of cover plate 22 relative to the vhead 15a `andof the space between the opposed conical crushing plates 18 and :23.

Said cover plate 22 and conical plate 23 are formed with registeringcentral apertures 27 into which a chute 28 projects for fe'edingrocks orore into thehollow interior of or spaceV between the crushing plates. Ahousing (not shown) may beprovided for enclosing the crushing endV ofthe machine. To the rear end of the solid shaft 16, is keyed a cam 29which rests upon a plurality of tapered rollers29a` carried within acage 3 0, the said rollersbeing arranged to roll within a race or ring31 which is set within said counterbore 111,v and retained in place byan annular offset member 32, which also bears against the side of thecae' 30, retaining it in proper position as wel The cam 29 is providedwith an annular lil j el) plate engages an annular groove Vformed in' anut 36 on a screwthreaded stud 37 which is made integral with or rigidlysecured tov the end of the shaft and projects axiallyV therefrom. Bythis means, a Vlongitudinal adjustment of the cam 29 on the shaft 16 iseffected.' Y

A gear wheel 40 is preferably keyed on the hollow shaft 15 between thebearingsll and 12 for driving the crusher, and these bearings areprotected from dust and foreign matter by' annular cooperating tonguesand grooves 41 and 42 formed in the bearings *and shaft'15, and annularring plates 43 are mounted on the shaft adjacent the ends of thebearings to prevent dust from entering the grooves. v

In Figure 4'there is shown a modification ofthe means for oscillatingthe shaft 16, This mechanism v comprises the mounting of the cam29.loosely upon the end of the shaft 16 instead of havingthe same keyedthereto, the cam being supported by tapered rollers 29a,.as in Figure1,- to roll thereon. Y There is providedl a ring 44 suitably kept fromrevolving by means of a lug 48 projecting from the end cover plate andengaging within a bifurcated lug 49 formed integral with said ringl 44.Said ring 44 isformed with a lateral flange having internal teethformedwithin its periphery.

An annular gear 46 is suitably fixed to the end ofthe 4shaft 16 adjacentsaid cam 20, and afse'ries of small gears 47 are carried uponv the outerside of the' cam, meshing` with the teeth of the gear 46 and the flangedring 44. v j l Iny Figure y6 a fragmentary section of t-he crusher head17 and the socket formed on the shaft 15 is shown provided with alleibleV annular member 35. This member 35 slides'under ring k36, and theopposite circumference'of the flexible membery is 'suit'- ably supportedupon Ya substantially yflat ring 37 vjammed Within a crevice-38 betweenthelsurface of the crusher headV 17 and the plate 18. Sufficient slackis left in the flex-v ible member to accommodate maximum relativemovement'between the shaft15 and the crusher head17. ,c y Y 'In order toprevent damage or strain from being placed upon the various parts of themachine when the'machine is run withthe crusher plates empty orVnearlyjso,fthere,"is provided a thrust collar 5()k suitably securedY'upon'the shaft 16, which abuts against ythe said cam 29 and the end ofthe hollow' shaft. lIn operation, p'ower'applied to the gear 40 rotatesthe hollow Vshaft 15 andthe outer crushing plate which is carriedthereby.

"I The' lug's2() formed on thesocket shaped ing plates.`

extension of the shaft 15 engage within the slotsv 21 of the sphericalmember 17, causing the shaft 16 to rotate in unison with it. The rearend of the shaft 16 resting upon the cam 2 9., which, in actuality,comprises the inner member of the tapered roller race, has Yimparted toit an oscillatory or gyratory motion. ,A y

` The cam 29`rolling over the rollers ad- Vance at a greater velocitythan the rollers and in so doing the higher and lower spots on theperiphery of theV cam 29 must pass the rollers and so develop a gyratorymotion in the end of the shaft 16 to whichthe cam isl secured. Asufficient clearance being present to accommodate for thev tilting ofthe shaft 164 the spherical member or crush-v ing head moves within thecup-shaped socket formed inthe end of hollow shaft 15, tilting theconical crusher 'plate carried thereby and eecting the crushingoperation upon the outer conical plate.`

Materials to be crushed are Vfed through Y the chute and lodgebetweenfthe plates, A

the centrifugal force due to both plates ro tating in unison ashereinbefore explained, directs the material outward to 'the peripheralrestricted space between the'plates where the crushingaction' takesplace, and as the materials are crushed by the progresH sive advancingof theplates toward one another, the crushed material is dischargedthrough the space between the peripheries ofthe plates, and the processrepeated.

Tt will be obvio-us'that the ring cani 29 hcreinbefore describeddevelops a' multiplicity of eccentric throws per single revolution ofthe crusher plates,`and it will be understood that `by varying thenumber of rollers the number of relative tiltings of the plates may beincreased Vor diminished, as may be desired. The gyratory `mechanismAmay easily 4be adjusted for wear by the nut on the'end ofthe shaft 16.'lVear in the plates may beadjusted by removing one or more shimsfon thebolts 24 and thereby spacing the outervplate nearer the inner plate. f,

In the operationof the'Fig-ure'-4 and Figure 5 type of construction, thegear 46 being fixed to the shaft 16, drives the gears 47 around thestationary ring 45, the gearsfin turn actuating the cam 29, causing thesame to revolve upon the rollers 29a at a speed different than that ofthe shaft 16. This form ofthe invention, it will be understood, providesfor a variable rate of regulation of the crushing strokes of themachine.

From the foregoing, it will be seen that construction, using only asingle drive gear, possessing few parts, materially eliminatingfriction, and providing for a wide range of crushing blows perrevolution` of the crushllU Modification of the above may be made withinthe spirit and scope of the invention.

What we claim is l. In a crushing machine, the combination with a drivenhollow shaft having a socket extension, a conical crushing plate carriedthereby, a shaft within said hollow shaft having a crushing head and aconical crushing plate oppositely disposed to first named plate, meansto connect said plate with said socket whereby both shafts are driven inunison, a cam secured to the opposite end of said shaft, rollersengaging with said cam and arranged between said camand a stationarybearing surface, and means to adjust the cam longitudinally.

- 2. A crushing machine including oppositely disposed crusher platescarried on inner and outer shafts, means to drive both shafts in unisonwhile permitting a relative tilting of the plates, and out of roundmeans in the bearing of one of the shafts and fixed on said shaft torotate therewith whereby a gyratory movement is transmitted to thatshaft to provide a tilting of the Crusher plate carried thereby.

3. A crushing machine including oppositely disposed spaced Crusherplates, shafts supporting the plates, the inner shaft bearing in theouter shaft in a ball and socket joint at a point adjacent said plates,me` chanical means to lock the two shafts together without interferencewith the freedom of the ball and socket connection, means to drive theouter shaft, a bearing for the end of the inner shaft, and means withinsaid bearing to produce a gyratory movement in the said shaft wherebythe plate carried thereby is progressively advanced and withdrawn fromthe opposed plate during the rotation of both plates in unison.

4. In a crushing machine, the combination with oppositely disposedcrushing plates adapted to rotate in unison and have a relative tiltingmovement with respect to each other, of a hollow shaft carrying oneplate, a second shaft within said shaft carrying the other plate, and amechanism to produce said tilting movement of the last mentioned plateranged to travel on the rollers for trans-` mitting a gyratory movementto the shaft.

5. A crushing machine comprising 1n combination, shafts, bearings forthe outer shaft,

a ball and socket bearing in the end ofthe outer shaft to receive oneend of the inner shaft, a roller bea-ring for the opposite end of theinner shaft,.a cam keyed onto said opposite end of said inner shaft andtravelling on said rollers to produce gyrato movement in the innershaft, means to loc the inner and outer shafts together withoutinterfering with the freedom of relative movement between the shafts,and oppositely dis osed crushing plates carried by the said sha ts andactuated toward and away from each other in a tilting manner by said camto crush objects contained between said plates.

6. A crushing machine comprising, in combination, two shafts, a ball.and socket bearing in theend of one shaft to allow said shaft to betilted relative to other shaft, opposed plates attached to each shaft insuch a manner that one shaft and plate are relatively tiltable,an innerring and an outer ring, rollers traveling on said rings, a roller cagefor containing and spacing said rollers, and auxiliary driving mechanismto rotate said inner ring at a greater or lesser velocity than saidshaft.

7. A crushing machine including oppositely disposed crushing plates,shafts supporting said plates, means to drive both shafts in unisonwhile permitting a relative tilting of said plates, meansV to cause oneshaft to move eccentrically in respect to the other, eil'ectingarelative tilting movement between the plates, a cam bearlng for one ofsaid shafts, and a gear system to drive said cam bearing for providing aspeed ratio between last named shaft and said cam ring.

In testimony whereof we aiiix our signatures.

JOHN A. DORMER. JAMES GUNNELL MALONE.

